固化/稳定化垃圾焚烧飞灰中的Pb在干湿交替环境中的溶出风险评估

吴翔宇; 王禕天; 张晗; 徐宏勇; 蔡兰坤

doi:10.13205/j.hjgc.202011022

固化/稳定化垃圾焚烧飞灰中的Pb在干湿交替环境中的溶出风险评估

doi: 10.13205/j.hjgc.202011022

华东理工大学资源与环境工程学院国家环境保护化工过程环境风险评价与控制重点实验室, 上海 200237

详细信息

作者简介:
吴翔宇(1994-),男,硕士研究生,主要研究方向为固体废弃物的处理与处置。ulysessweb@qq.com

通讯作者:
蔡兰坤(1966-),男,博士,教授,主要从事水处理药剂、固体废弃物处理、文物保护等研究工作。cailankun@126.com

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出版历程
- 收稿日期: 2019-11-08
- 网络出版日期: 2021-04-23
- 刊出日期: 2021-04-23

LEACHING ENVIRONMENTAL RISK EVALUATION OF Pb IN SOLIDIFIED/STABILIZED MUNICIPAL SOLID WASTE INCINERATION FLY ASH UNDER WETTING AND DRYING INTERMITTENT

State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China

摘要

摘要: 评估了水泥+螯合剂协同处理垃圾焚烧飞灰中的铅（Pb）在干湿交替环境中的溶出风险。结果表明：在干湿交替环境中，水泥+螯合剂协同处理飞灰的矿物组成可保持稳定，水化程度有所提高。经过30次干湿交替后，由于飞灰颗粒受到更多水化产物的保护，Pb的浸出毒性从0.15 mg/L降低至0.05 mg/L。另外，协同处理与单独的水泥固化相比，对Pb的稳定化效果更好，Pb的浸出毒性更易达到GB 16889—2008《生活垃圾填埋场污染控制标准》；经过同样的12次干湿交替后，协同处理飞灰中Pb的浸出毒性（<0.05 mg/L）远低于单独的螯合稳定飞灰（0.53 mg/L），溶出风险显著降低。因此，水泥+螯合剂协同工艺适用于干湿交替高发地区的垃圾焚烧飞灰中Pb的稳定化处理。
- 重金属污染 /
- 干湿交替 /
- 飞灰 /
- 水泥固化 /
- 螯合稳定
Abstract: This study evaluated the environmental risk of lead (Pb) under wetting and drying (W-D) intermittent in fly ash from municipal solid waste incineration (MSWI), co-treated with cement and chelator. The results showed that the mineral composition of the co-treated fly ash kept stable and the hydration degree improved under W-D intermittent. Thus, the environmental risk of Pb got reduced due to the protection by more hydration products. In addition, compared with traditional cement-solidification method, co-treatment was more efficient in stabilizing Pb and easily made Pb meet the standard for pollution control of the landfill site of municipal solid waste (GB 16889—2008); compared with chelator-stabilization, the environmental risk of Pb under W-D intermittent was significantly reduced. Therefore, cement and chelator co-treatment was suitable for the stabilization of Pb in MSWI fly ash in areas with high W-D intermittent incidence.
- heavy metal pollution /
- wetting and drying intermittent /
- fly ash /
- cement-solidification /
- chelator-stabilization

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